./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0fc665e3899dd29ca5bf696fac98a46e2d1733c214ee43bc57c8fd7a101d2539 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:38:01,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:38:01,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:38:01,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:38:01,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:38:01,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:38:01,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:38:01,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:38:01,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:38:01,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:38:01,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:38:01,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:38:01,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:38:01,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:38:01,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:38:01,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:38:01,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:38:01,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:38:01,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:38:01,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:38:01,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:38:01,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:38:01,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:38:01,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:38:01,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:38:01,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:38:01,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:38:01,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:38:01,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:38:01,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:38:01,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:38:01,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:38:01,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:38:01,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:38:01,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:38:01,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:38:01,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:38:01,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:38:01,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:38:01,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:38:01,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:38:01,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:38:01,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:38:01,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:38:01,638 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:38:01,638 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:38:01,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:38:01,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:38:01,640 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:38:01,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:38:01,640 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:38:01,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:38:01,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:38:01,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:38:01,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:38:01,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:38:01,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:38:01,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:38:01,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:38:01,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:38:01,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:38:01,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:38:01,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:38:01,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:38:01,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:38:01,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:38:01,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:38:01,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:38:01,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:38:01,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:38:01,645 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:38:01,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:38:01,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:38:01,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:38:01,646 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0fc665e3899dd29ca5bf696fac98a46e2d1733c214ee43bc57c8fd7a101d2539 [2021-11-07 07:38:01,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:38:02,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:38:02,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:38:02,011 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:38:02,013 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:38:02,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/product-lines/email_spec9_product22.cil.c [2021-11-07 07:38:02,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/data/9f90082a0/424baaad97cb4ddd9ee5df1a1dbd8b15/FLAGee23a70f3 [2021-11-07 07:38:02,778 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:38:02,778 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c [2021-11-07 07:38:02,798 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/data/9f90082a0/424baaad97cb4ddd9ee5df1a1dbd8b15/FLAGee23a70f3 [2021-11-07 07:38:02,977 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/data/9f90082a0/424baaad97cb4ddd9ee5df1a1dbd8b15 [2021-11-07 07:38:02,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:38:02,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:38:02,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:38:02,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:38:02,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:38:02,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:38:02" (1/1) ... [2021-11-07 07:38:02,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2401a0dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:02, skipping insertion in model container [2021-11-07 07:38:02,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:38:02" (1/1) ... [2021-11-07 07:38:03,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:38:03,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:38:03,602 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c[51984,51997] [2021-11-07 07:38:03,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:38:03,665 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:38:03,770 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/sv-benchmarks/c/product-lines/email_spec9_product22.cil.c[51984,51997] [2021-11-07 07:38:03,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:38:03,832 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:38:03,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03 WrapperNode [2021-11-07 07:38:03,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:38:03,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:38:03,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:38:03,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:38:03,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:03,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:38:04,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:38:04,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:38:04,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:38:04,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:38:04,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:38:04,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:38:04,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:38:04,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (1/1) ... [2021-11-07 07:38:04,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:38:04,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:04,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:04,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:38:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 07:38:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:38:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:38:04,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:38:04,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:38:06,579 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:38:06,579 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 07:38:06,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:06 BoogieIcfgContainer [2021-11-07 07:38:06,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:38:06,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:38:06,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:38:06,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:38:06,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:38:02" (1/3) ... [2021-11-07 07:38:06,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad2a9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:38:06, skipping insertion in model container [2021-11-07 07:38:06,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:03" (2/3) ... [2021-11-07 07:38:06,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad2a9e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:38:06, skipping insertion in model container [2021-11-07 07:38:06,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:06" (3/3) ... [2021-11-07 07:38:06,591 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product22.cil.c [2021-11-07 07:38:06,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:38:06,598 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 07:38:06,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:38:06,663 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:38:06,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 07:38:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 479 states, 476 states have (on average 1.7415966386554622) internal successors, (829), 478 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:38:06,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:06,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:06,707 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:06,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1963774830, now seen corresponding path program 1 times [2021-11-07 07:38:06,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:06,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243239348] [2021-11-07 07:38:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:06,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:07,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:07,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243239348] [2021-11-07 07:38:07,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243239348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:07,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:07,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:07,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996771760] [2021-11-07 07:38:07,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:07,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:07,218 INFO L87 Difference]: Start difference. First operand has 479 states, 476 states have (on average 1.7415966386554622) internal successors, (829), 478 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:07,425 INFO L93 Difference]: Finished difference Result 1402 states and 2429 transitions. [2021-11-07 07:38:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:07,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 07:38:07,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:07,458 INFO L225 Difference]: With dead ends: 1402 [2021-11-07 07:38:07,459 INFO L226 Difference]: Without dead ends: 782 [2021-11-07 07:38:07,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-11-07 07:38:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 400. [2021-11-07 07:38:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.7412060301507537) internal successors, (693), 399 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 693 transitions. [2021-11-07 07:38:07,584 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 693 transitions. Word has length 41 [2021-11-07 07:38:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:07,585 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 693 transitions. [2021-11-07 07:38:07,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 693 transitions. [2021-11-07 07:38:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:38:07,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:07,596 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:07,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:38:07,597 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash -57545697, now seen corresponding path program 1 times [2021-11-07 07:38:07,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:07,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77171155] [2021-11-07 07:38:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:07,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:07,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:07,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77171155] [2021-11-07 07:38:07,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77171155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:07,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:07,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:07,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600864674] [2021-11-07 07:38:07,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:38:07,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:07,807 INFO L87 Difference]: Start difference. First operand 400 states and 693 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:07,996 INFO L93 Difference]: Finished difference Result 1149 states and 1995 transitions. [2021-11-07 07:38:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:38:07,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 07:38:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:08,003 INFO L225 Difference]: With dead ends: 1149 [2021-11-07 07:38:08,003 INFO L226 Difference]: Without dead ends: 768 [2021-11-07 07:38:08,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-11-07 07:38:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 400. [2021-11-07 07:38:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.7386934673366834) internal successors, (692), 399 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 692 transitions. [2021-11-07 07:38:08,029 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 692 transitions. Word has length 43 [2021-11-07 07:38:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:08,030 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 692 transitions. [2021-11-07 07:38:08,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 692 transitions. [2021-11-07 07:38:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:38:08,032 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:08,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:08,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:38:08,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:08,034 INFO L85 PathProgramCache]: Analyzing trace with hash -167255374, now seen corresponding path program 1 times [2021-11-07 07:38:08,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:08,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75477258] [2021-11-07 07:38:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:08,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:08,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:08,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75477258] [2021-11-07 07:38:08,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75477258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:08,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:08,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:08,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067234029] [2021-11-07 07:38:08,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:08,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:08,123 INFO L87 Difference]: Start difference. First operand 400 states and 692 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:08,190 INFO L93 Difference]: Finished difference Result 782 states and 1358 transitions. [2021-11-07 07:38:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:08,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 07:38:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:08,194 INFO L225 Difference]: With dead ends: 782 [2021-11-07 07:38:08,195 INFO L226 Difference]: Without dead ends: 405 [2021-11-07 07:38:08,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-07 07:38:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 400. [2021-11-07 07:38:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.7311557788944723) internal successors, (689), 399 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 689 transitions. [2021-11-07 07:38:08,222 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 689 transitions. Word has length 44 [2021-11-07 07:38:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:08,223 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 689 transitions. [2021-11-07 07:38:08,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 689 transitions. [2021-11-07 07:38:08,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:38:08,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:08,226 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:08,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:38:08,227 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:08,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1603291255, now seen corresponding path program 1 times [2021-11-07 07:38:08,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:08,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430176306] [2021-11-07 07:38:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:08,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:08,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:08,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430176306] [2021-11-07 07:38:08,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430176306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:08,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:08,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:08,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006454357] [2021-11-07 07:38:08,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:38:08,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:08,390 INFO L87 Difference]: Start difference. First operand 400 states and 689 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:08,561 INFO L93 Difference]: Finished difference Result 1139 states and 1975 transitions. [2021-11-07 07:38:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:08,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 07:38:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:08,568 INFO L225 Difference]: With dead ends: 1139 [2021-11-07 07:38:08,568 INFO L226 Difference]: Without dead ends: 766 [2021-11-07 07:38:08,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:38:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-07 07:38:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 400. [2021-11-07 07:38:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.728643216080402) internal successors, (688), 399 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 688 transitions. [2021-11-07 07:38:08,601 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 688 transitions. Word has length 46 [2021-11-07 07:38:08,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:08,601 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 688 transitions. [2021-11-07 07:38:08,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 688 transitions. [2021-11-07 07:38:08,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 07:38:08,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:08,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:08,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:38:08,604 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:08,607 INFO L85 PathProgramCache]: Analyzing trace with hash 841215988, now seen corresponding path program 1 times [2021-11-07 07:38:08,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:08,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974481351] [2021-11-07 07:38:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:08,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:08,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:08,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974481351] [2021-11-07 07:38:08,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974481351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:08,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:08,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:08,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944135572] [2021-11-07 07:38:08,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:38:08,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:08,739 INFO L87 Difference]: Start difference. First operand 400 states and 688 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:08,923 INFO L93 Difference]: Finished difference Result 1144 states and 1979 transitions. [2021-11-07 07:38:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:08,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 07:38:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:08,930 INFO L225 Difference]: With dead ends: 1144 [2021-11-07 07:38:08,930 INFO L226 Difference]: Without dead ends: 771 [2021-11-07 07:38:08,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:38:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-07 07:38:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 400. [2021-11-07 07:38:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.7261306532663316) internal successors, (687), 399 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 687 transitions. [2021-11-07 07:38:08,961 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 687 transitions. Word has length 47 [2021-11-07 07:38:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:08,963 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 687 transitions. [2021-11-07 07:38:08,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 687 transitions. [2021-11-07 07:38:08,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:38:08,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:08,967 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:08,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:38:08,968 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash -795178020, now seen corresponding path program 1 times [2021-11-07 07:38:08,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:08,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536104466] [2021-11-07 07:38:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:08,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:09,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:09,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536104466] [2021-11-07 07:38:09,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536104466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:09,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:09,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:09,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262271112] [2021-11-07 07:38:09,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:09,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:09,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:09,105 INFO L87 Difference]: Start difference. First operand 400 states and 687 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:09,144 INFO L93 Difference]: Finished difference Result 558 states and 943 transitions. [2021-11-07 07:38:09,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:09,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 07:38:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:09,156 INFO L225 Difference]: With dead ends: 558 [2021-11-07 07:38:09,156 INFO L226 Difference]: Without dead ends: 403 [2021-11-07 07:38:09,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-07 07:38:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 402. [2021-11-07 07:38:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 400 states have (on average 1.7225) internal successors, (689), 401 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 689 transitions. [2021-11-07 07:38:09,186 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 689 transitions. Word has length 48 [2021-11-07 07:38:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:09,187 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 689 transitions. [2021-11-07 07:38:09,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 689 transitions. [2021-11-07 07:38:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:38:09,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:09,189 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:09,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:38:09,189 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:09,190 INFO L85 PathProgramCache]: Analyzing trace with hash 983697582, now seen corresponding path program 1 times [2021-11-07 07:38:09,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:09,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554957990] [2021-11-07 07:38:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:09,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:09,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:09,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554957990] [2021-11-07 07:38:09,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554957990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:09,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:09,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:09,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798379354] [2021-11-07 07:38:09,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:09,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:09,305 INFO L87 Difference]: Start difference. First operand 402 states and 689 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:09,366 INFO L93 Difference]: Finished difference Result 1092 states and 1891 transitions. [2021-11-07 07:38:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 07:38:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:09,372 INFO L225 Difference]: With dead ends: 1092 [2021-11-07 07:38:09,372 INFO L226 Difference]: Without dead ends: 721 [2021-11-07 07:38:09,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-11-07 07:38:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 566. [2021-11-07 07:38:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 564 states have (on average 1.75354609929078) internal successors, (989), 565 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 989 transitions. [2021-11-07 07:38:09,418 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 989 transitions. Word has length 56 [2021-11-07 07:38:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:09,421 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 989 transitions. [2021-11-07 07:38:09,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 989 transitions. [2021-11-07 07:38:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 07:38:09,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:09,423 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:09,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:38:09,424 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1126303313, now seen corresponding path program 1 times [2021-11-07 07:38:09,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:09,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413107087] [2021-11-07 07:38:09,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:09,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:09,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:09,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413107087] [2021-11-07 07:38:09,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413107087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:09,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:09,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:09,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926801456] [2021-11-07 07:38:09,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:38:09,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:09,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:09,562 INFO L87 Difference]: Start difference. First operand 566 states and 989 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:09,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:09,963 INFO L93 Difference]: Finished difference Result 1628 states and 2873 transitions. [2021-11-07 07:38:09,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:09,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 07:38:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:09,973 INFO L225 Difference]: With dead ends: 1628 [2021-11-07 07:38:09,973 INFO L226 Difference]: Without dead ends: 1093 [2021-11-07 07:38:09,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:38:09,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-11-07 07:38:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 566. [2021-11-07 07:38:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 564 states have (on average 1.75) internal successors, (987), 565 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 987 transitions. [2021-11-07 07:38:10,055 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 987 transitions. Word has length 57 [2021-11-07 07:38:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:10,056 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 987 transitions. [2021-11-07 07:38:10,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 987 transitions. [2021-11-07 07:38:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:38:10,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:10,058 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:10,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:38:10,058 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash -78769224, now seen corresponding path program 1 times [2021-11-07 07:38:10,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:10,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19583944] [2021-11-07 07:38:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:10,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:10,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:10,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19583944] [2021-11-07 07:38:10,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19583944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:10,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:10,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:10,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653643680] [2021-11-07 07:38:10,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:10,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:10,150 INFO L87 Difference]: Start difference. First operand 566 states and 987 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:10,247 INFO L93 Difference]: Finished difference Result 1626 states and 2865 transitions. [2021-11-07 07:38:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:10,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 07:38:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:10,256 INFO L225 Difference]: With dead ends: 1626 [2021-11-07 07:38:10,256 INFO L226 Difference]: Without dead ends: 1091 [2021-11-07 07:38:10,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-11-07 07:38:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 936. [2021-11-07 07:38:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 934 states have (on average 1.7815845824411134) internal successors, (1664), 935 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:10,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1664 transitions. [2021-11-07 07:38:10,332 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1664 transitions. Word has length 58 [2021-11-07 07:38:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:10,333 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1664 transitions. [2021-11-07 07:38:10,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1664 transitions. [2021-11-07 07:38:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:38:10,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:10,335 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:10,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:38:10,336 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:10,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1155314650, now seen corresponding path program 1 times [2021-11-07 07:38:10,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:10,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004910428] [2021-11-07 07:38:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:10,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:10,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:10,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004910428] [2021-11-07 07:38:10,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004910428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:10,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751036608] [2021-11-07 07:38:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:10,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:10,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:10,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:10,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:38:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:38:10,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:38:10,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751036608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:10,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:38:10,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-07 07:38:10,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038621585] [2021-11-07 07:38:10,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:10,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:10,968 INFO L87 Difference]: Start difference. First operand 936 states and 1664 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:11,048 INFO L93 Difference]: Finished difference Result 1049 states and 1846 transitions. [2021-11-07 07:38:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:11,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 07:38:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:11,057 INFO L225 Difference]: With dead ends: 1049 [2021-11-07 07:38:11,057 INFO L226 Difference]: Without dead ends: 930 [2021-11-07 07:38:11,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-11-07 07:38:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 930. [2021-11-07 07:38:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 1.781485468245425) internal successors, (1655), 929 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1655 transitions. [2021-11-07 07:38:11,150 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1655 transitions. Word has length 58 [2021-11-07 07:38:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:11,150 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1655 transitions. [2021-11-07 07:38:11,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1655 transitions. [2021-11-07 07:38:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 07:38:11,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:11,160 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:11,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:11,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:38:11,376 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:11,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1558818986, now seen corresponding path program 1 times [2021-11-07 07:38:11,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:11,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580919515] [2021-11-07 07:38:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:11,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:11,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:11,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580919515] [2021-11-07 07:38:11,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580919515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:11,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383907295] [2021-11-07 07:38:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:11,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:11,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:11,474 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:11,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:38:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:11,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:38:11,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:12,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383907295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:12,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:12,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:38:12,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108415764] [2021-11-07 07:38:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:38:12,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:12,162 INFO L87 Difference]: Start difference. First operand 930 states and 1655 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:12,295 INFO L93 Difference]: Finished difference Result 1451 states and 2544 transitions. [2021-11-07 07:38:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:38:12,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-07 07:38:12,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:12,305 INFO L225 Difference]: With dead ends: 1451 [2021-11-07 07:38:12,305 INFO L226 Difference]: Without dead ends: 1302 [2021-11-07 07:38:12,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-07 07:38:12,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1150. [2021-11-07 07:38:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.7859007832898173) internal successors, (2052), 1149 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 2052 transitions. [2021-11-07 07:38:12,405 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 2052 transitions. Word has length 93 [2021-11-07 07:38:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:12,405 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 2052 transitions. [2021-11-07 07:38:12,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 2052 transitions. [2021-11-07 07:38:12,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 07:38:12,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:12,410 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:12,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:12,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_529badf4-cc00-4c73-9f75-b72d67c2fd3c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:12,624 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:12,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:12,624 INFO L85 PathProgramCache]: Analyzing trace with hash -730403193, now seen corresponding path program 1 times [2021-11-07 07:38:12,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:12,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453615269] [2021-11-07 07:38:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:12,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:12,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:12,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453615269] [2021-11-07 07:38:12,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453615269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:12,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:12,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:12,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516750353] [2021-11-07 07:38:12,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:12,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:12,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:12,714 INFO L87 Difference]: Start difference. First operand 1150 states and 2052 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:12,871 INFO L93 Difference]: Finished difference Result 3080 states and 5523 transitions. [2021-11-07 07:38:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-07 07:38:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:12,886 INFO L225 Difference]: With dead ends: 3080 [2021-11-07 07:38:12,887 INFO L226 Difference]: Without dead ends: 2031 [2021-11-07 07:38:12,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-11-07 07:38:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1882. [2021-11-07 07:38:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 1.7995746943115365) internal successors, (3385), 1881 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3385 transitions. [2021-11-07 07:38:13,051 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3385 transitions. Word has length 97 [2021-11-07 07:38:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:13,052 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 3385 transitions. [2021-11-07 07:38:13,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3385 transitions. [2021-11-07 07:38:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 07:38:13,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:13,058 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:13,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:38:13,058 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1067928583, now seen corresponding path program 1 times [2021-11-07 07:38:13,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:13,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150248663] [2021-11-07 07:38:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:13,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:13,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:13,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150248663] [2021-11-07 07:38:13,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150248663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:13,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:13,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:13,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058262231] [2021-11-07 07:38:13,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:13,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:13,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:13,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:13,154 INFO L87 Difference]: Start difference. First operand 1882 states and 3385 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:13,389 INFO L93 Difference]: Finished difference Result 5012 states and 9041 transitions. [2021-11-07 07:38:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 07:38:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:13,415 INFO L225 Difference]: With dead ends: 5012 [2021-11-07 07:38:13,415 INFO L226 Difference]: Without dead ends: 3265 [2021-11-07 07:38:13,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2021-11-07 07:38:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 3116. [2021-11-07 07:38:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 3115 states have (on average 1.8060995184590691) internal successors, (5626), 3115 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:13,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 5626 transitions. [2021-11-07 07:38:13,680 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 5626 transitions. Word has length 98 [2021-11-07 07:38:13,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:13,680 INFO L470 AbstractCegarLoop]: Abstraction has 3116 states and 5626 transitions. [2021-11-07 07:38:13,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 5626 transitions. [2021-11-07 07:38:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 07:38:13,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:13,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:13,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:38:13,691 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:13,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1710816440, now seen corresponding path program 1 times [2021-11-07 07:38:13,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:13,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734582306] [2021-11-07 07:38:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:13,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:13,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:13,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734582306] [2021-11-07 07:38:13,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734582306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:13,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:13,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:13,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755631879] [2021-11-07 07:38:13,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:13,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:13,781 INFO L87 Difference]: Start difference. First operand 3116 states and 5626 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:14,173 INFO L93 Difference]: Finished difference Result 8430 states and 15247 transitions. [2021-11-07 07:38:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 07:38:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:14,213 INFO L225 Difference]: With dead ends: 8430 [2021-11-07 07:38:14,213 INFO L226 Difference]: Without dead ends: 5483 [2021-11-07 07:38:14,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:14,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-11-07 07:38:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5334. [2021-11-07 07:38:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5334 states, 5333 states have (on average 1.8081755109694355) internal successors, (9643), 5333 states have internal predecessors, (9643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5334 states to 5334 states and 9643 transitions. [2021-11-07 07:38:14,653 INFO L78 Accepts]: Start accepts. Automaton has 5334 states and 9643 transitions. Word has length 99 [2021-11-07 07:38:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:14,653 INFO L470 AbstractCegarLoop]: Abstraction has 5334 states and 9643 transitions. [2021-11-07 07:38:14,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5334 states and 9643 transitions. [2021-11-07 07:38:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 07:38:14,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:14,667 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:14,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:38:14,668 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:14,669 INFO L85 PathProgramCache]: Analyzing trace with hash 626981144, now seen corresponding path program 1 times [2021-11-07 07:38:14,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:14,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87150140] [2021-11-07 07:38:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:14,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:14,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:14,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87150140] [2021-11-07 07:38:14,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87150140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:14,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:14,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:14,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102056555] [2021-11-07 07:38:14,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:14,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:14,753 INFO L87 Difference]: Start difference. First operand 5334 states and 9643 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:15,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:15,491 INFO L93 Difference]: Finished difference Result 15410 states and 27909 transitions. [2021-11-07 07:38:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:15,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 07:38:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:15,557 INFO L225 Difference]: With dead ends: 15410 [2021-11-07 07:38:15,558 INFO L226 Difference]: Without dead ends: 10253 [2021-11-07 07:38:15,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10253 states. [2021-11-07 07:38:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10253 to 10104. [2021-11-07 07:38:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10104 states, 10103 states have (on average 1.8097594773829555) internal successors, (18284), 10103 states have internal predecessors, (18284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10104 states to 10104 states and 18284 transitions. [2021-11-07 07:38:16,394 INFO L78 Accepts]: Start accepts. Automaton has 10104 states and 18284 transitions. Word has length 100 [2021-11-07 07:38:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:16,394 INFO L470 AbstractCegarLoop]: Abstraction has 10104 states and 18284 transitions. [2021-11-07 07:38:16,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 10104 states and 18284 transitions. [2021-11-07 07:38:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 07:38:16,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:16,418 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:16,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:38:16,419 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:16,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1679806375, now seen corresponding path program 1 times [2021-11-07 07:38:16,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:16,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240002869] [2021-11-07 07:38:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:16,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:16,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:16,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240002869] [2021-11-07 07:38:16,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240002869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:16,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:16,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:16,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301628304] [2021-11-07 07:38:16,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:16,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:16,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:16,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:16,500 INFO L87 Difference]: Start difference. First operand 10104 states and 18284 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:17,938 INFO L93 Difference]: Finished difference Result 29550 states and 53531 transitions. [2021-11-07 07:38:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:17,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 07:38:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:18,014 INFO L225 Difference]: With dead ends: 29550 [2021-11-07 07:38:18,015 INFO L226 Difference]: Without dead ends: 19631 [2021-11-07 07:38:18,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19631 states. [2021-11-07 07:38:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19631 to 19482. [2021-11-07 07:38:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19482 states, 19481 states have (on average 1.809198706431908) internal successors, (35245), 19481 states have internal predecessors, (35245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19482 states to 19482 states and 35245 transitions. [2021-11-07 07:38:19,592 INFO L78 Accepts]: Start accepts. Automaton has 19482 states and 35245 transitions. Word has length 101 [2021-11-07 07:38:19,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:19,593 INFO L470 AbstractCegarLoop]: Abstraction has 19482 states and 35245 transitions. [2021-11-07 07:38:19,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 19482 states and 35245 transitions. [2021-11-07 07:38:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 07:38:19,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:19,636 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:19,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:38:19,636 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1038516839, now seen corresponding path program 1 times [2021-11-07 07:38:19,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:19,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139615089] [2021-11-07 07:38:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:19,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:19,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:19,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139615089] [2021-11-07 07:38:19,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139615089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:19,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:19,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:19,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016053947] [2021-11-07 07:38:19,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:19,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:19,723 INFO L87 Difference]: Start difference. First operand 19482 states and 35245 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:21,403 INFO L93 Difference]: Finished difference Result 57870 states and 104728 transitions. [2021-11-07 07:38:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:21,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-07 07:38:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:21,542 INFO L225 Difference]: With dead ends: 57870 [2021-11-07 07:38:21,542 INFO L226 Difference]: Without dead ends: 38577 [2021-11-07 07:38:21,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38577 states. [2021-11-07 07:38:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38577 to 38428. [2021-11-07 07:38:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38428 states, 38427 states have (on average 1.8065943217008873) internal successors, (69422), 38427 states have internal predecessors, (69422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38428 states to 38428 states and 69422 transitions. [2021-11-07 07:38:24,244 INFO L78 Accepts]: Start accepts. Automaton has 38428 states and 69422 transitions. Word has length 102 [2021-11-07 07:38:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:24,245 INFO L470 AbstractCegarLoop]: Abstraction has 38428 states and 69422 transitions. [2021-11-07 07:38:24,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 38428 states and 69422 transitions. [2021-11-07 07:38:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 07:38:24,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:24,304 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:24,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:38:24,305 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:24,306 INFO L85 PathProgramCache]: Analyzing trace with hash -674852658, now seen corresponding path program 1 times [2021-11-07 07:38:24,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:24,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102204391] [2021-11-07 07:38:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:24,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 07:38:24,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:24,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102204391] [2021-11-07 07:38:24,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102204391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:24,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:24,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:24,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546608968] [2021-11-07 07:38:24,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:38:24,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:24,414 INFO L87 Difference]: Start difference. First operand 38428 states and 69422 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:27,885 INFO L93 Difference]: Finished difference Result 112979 states and 204065 transitions. [2021-11-07 07:38:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:38:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 07:38:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:28,095 INFO L225 Difference]: With dead ends: 112979 [2021-11-07 07:38:28,096 INFO L226 Difference]: Without dead ends: 74808 [2021-11-07 07:38:28,166 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74808 states. [2021-11-07 07:38:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74808 to 38428. [2021-11-07 07:38:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38428 states, 38427 states have (on average 1.7998802925026673) internal successors, (69164), 38427 states have internal predecessors, (69164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38428 states to 38428 states and 69164 transitions. [2021-11-07 07:38:30,885 INFO L78 Accepts]: Start accepts. Automaton has 38428 states and 69164 transitions. Word has length 103 [2021-11-07 07:38:30,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:30,886 INFO L470 AbstractCegarLoop]: Abstraction has 38428 states and 69164 transitions. [2021-11-07 07:38:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 38428 states and 69164 transitions. [2021-11-07 07:38:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 07:38:30,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:30,972 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:30,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:38:30,973 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:30,974 INFO L85 PathProgramCache]: Analyzing trace with hash 655977836, now seen corresponding path program 2 times [2021-11-07 07:38:30,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:30,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508515494] [2021-11-07 07:38:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:30,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:31,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:31,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508515494] [2021-11-07 07:38:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508515494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:31,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:31,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642668703] [2021-11-07 07:38:31,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:38:31,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:31,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:31,094 INFO L87 Difference]: Start difference. First operand 38428 states and 69164 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:32,947 INFO L93 Difference]: Finished difference Result 76742 states and 138130 transitions. [2021-11-07 07:38:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 07:38:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:33,051 INFO L225 Difference]: With dead ends: 76742 [2021-11-07 07:38:33,052 INFO L226 Difference]: Without dead ends: 38577 [2021-11-07 07:38:33,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:38:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38577 states. [2021-11-07 07:38:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38577 to 38428. [2021-11-07 07:38:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38428 states, 38427 states have (on average 1.7965493012725426) internal successors, (69036), 38427 states have internal predecessors, (69036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38428 states to 38428 states and 69036 transitions. [2021-11-07 07:38:35,084 INFO L78 Accepts]: Start accepts. Automaton has 38428 states and 69036 transitions. Word has length 103 [2021-11-07 07:38:35,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:35,085 INFO L470 AbstractCegarLoop]: Abstraction has 38428 states and 69036 transitions. [2021-11-07 07:38:35,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:35,085 INFO L276 IsEmpty]: Start isEmpty. Operand 38428 states and 69036 transitions. [2021-11-07 07:38:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 07:38:35,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:35,127 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:35,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:38:35,127 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash 519883417, now seen corresponding path program 1 times [2021-11-07 07:38:35,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:35,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106112309] [2021-11-07 07:38:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:35,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:35,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:35,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106112309] [2021-11-07 07:38:35,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106112309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:35,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:35,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:35,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176134241] [2021-11-07 07:38:35,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:35,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:35,212 INFO L87 Difference]: Start difference. First operand 38428 states and 69036 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:38,099 INFO L93 Difference]: Finished difference Result 106864 states and 191708 transitions. [2021-11-07 07:38:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 07:38:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:38,240 INFO L225 Difference]: With dead ends: 106864 [2021-11-07 07:38:38,240 INFO L226 Difference]: Without dead ends: 68659 [2021-11-07 07:38:38,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68659 states. [2021-11-07 07:38:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68659 to 68510. [2021-11-07 07:38:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68510 states, 68509 states have (on average 1.7886846983607994) internal successors, (122541), 68509 states have internal predecessors, (122541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68510 states to 68510 states and 122541 transitions. [2021-11-07 07:38:42,116 INFO L78 Accepts]: Start accepts. Automaton has 68510 states and 122541 transitions. Word has length 103 [2021-11-07 07:38:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:42,116 INFO L470 AbstractCegarLoop]: Abstraction has 68510 states and 122541 transitions. [2021-11-07 07:38:42,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:42,117 INFO L276 IsEmpty]: Start isEmpty. Operand 68510 states and 122541 transitions. [2021-11-07 07:38:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 07:38:42,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:42,167 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:42,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:38:42,167 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:42,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:42,168 INFO L85 PathProgramCache]: Analyzing trace with hash 368621106, now seen corresponding path program 1 times [2021-11-07 07:38:42,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:42,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617506212] [2021-11-07 07:38:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:42,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:38:42,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:42,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617506212] [2021-11-07 07:38:42,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617506212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:42,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:42,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 07:38:42,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313602089] [2021-11-07 07:38:42,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:38:42,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:38:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:38:42,338 INFO L87 Difference]: Start difference. First operand 68510 states and 122541 transitions. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:50,193 INFO L93 Difference]: Finished difference Result 137940 states and 246526 transitions. [2021-11-07 07:38:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:38:50,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 07:38:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:50,491 INFO L225 Difference]: With dead ends: 137940 [2021-11-07 07:38:50,491 INFO L226 Difference]: Without dead ends: 137811 [2021-11-07 07:38:50,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:38:50,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137811 states.